Hirose FX10A-120P/12-SV1(91) — 120-Position, 0.50mm Pitch Mezzanine Header
The Hirose FX10A-120P/12-SV1(91) is a 120-position surface-mount header from the FunctionMax™ FX10 series, designed for board-to-board mezzanine stacking at a 5 mm mated height. A built-in board guide aligns the connector during assembly, the ground plate provides a low-impedance return path, and the solder retention feature holds the part in place during reflow.
The 5 mm mated stack height is the z-axis budget: your two boards sit exactly 5 mm apart when mated, so the mating receptacle on the opposite board must match this height. If your enclosure has a tighter or looser gap, you need a different stack height variant in the FX10 family.